PlaySudoku.us
Evil · Puzzle #61
4
2
7
1
9
3
2
1
8
3
1
9
4
3
2
8
6
8
5
8
1
7
4
5
9
"If you wish to make an apple pie from scratch, you must first invent the universe." — Carl Sagan
"If you wish to make an apple pie from scratch, you must first invent the universe." — Carl Sagan
The brain releases dopamine when it solves a puzzle — the same reward chemical triggered by food and exercise.
The brain releases dopamine when it solves a puzzle — the same reward chemical triggered by food and exercise.